[jira] [Commented] (HADOOP-9562) Create REST interface for HDFS health data

["Trevor Lorimer (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-9562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13700162#comment-13700162 ] 

Trevor Lorimer commented on HADOOP-9562:
----------------------------------------

Added 2 REST calls to HDFS (Status and CorruptFiles). 
CorruptFiles returns a List of Strings of corrupt file locations.

Status returns data from the NameNode that was inaccessible from FSNameSystem.

status: {
   role: "NameNode"
   state: "active"
   hostAndPort: "localhost:8020"
   securityEnabled: false
}
                
> Create REST interface for HDFS health data
> ------------------------------------------
>
>                 Key: HADOOP-9562
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9562
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs
>    Affects Versions: 2.0.4-alpha
>            Reporter: Trevor Lorimer
>            Priority: Minor
>         Attachments: HADOOP-9562.diff
>
>
> The HDFS health screen (dfshealth.jsp) displays basic Version, Security and Health information concerning the NameNode, currently this information is accessible from classes in the org.apache.hadoop,hdfs.server.namenode package and cannot be accessed outside the NameNode. This becomes prevalent if the data is required to be displayed using a new user interface.
> The proposal is to create a REST interface to expose all the information displayed on dfshealth.jsp using GET methods. Wrapper classes will be created to serve the data to the REST root resource within the hadoop-hdfs project.
> This will enable the HDFS health screen information to be accessed remotely.

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